that toppled hosni mubarak. cnn's reza sayah is in cairo. what is happening there now? this has been going on all day. what is happening now? >> it is 9:00 p.m. local time, victor, and here in tahrir square we're starting to see some of the protesters leave. there are still several thousand people here, but things relatively calm at this location. however, in other parts of cairo, in other parts of egypt, things seem to be escalating, we're seeing violence in pockets of clashes in the side streets, few blocks away from tahrir square. we're seeing clashes between protesters and police in front of the state tv building here in cairo, several blocks away. we're also seeing clashes, we can also tell you that protesters have blocked off traffic in both directions. the 6th of october bridge, a major bridge over the river. they also blocked off a subway system here near in tahrir square. hard to believe it was two years ago, but an uprising here in egypt eventually toppled then president hosni mubarak, and it started right here in tahrir square this iconic landmark, people gathered and demanded a